package com.atguigu.springcloud.alibaba.controller;

/**
 * @program: cloud2020
 * @description: TODO
 * @author: YuWenYi
 * @create: 2021-04-18 17:09
 **/
import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;

import com.atguigu.springcloud.alibaba.service.PaymentService;
import com.atguigu.springcloud.entity.CommonResult;
import com.atguigu.springcloud.entity.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.util.concurrent.TimeUnit;

@RestController
@Slf4j
public class CircleBreakerController {
    public static final String SERVICE_URL = "http://nacos-payment-provider";

    @Resource
    private RestTemplate restTemplate;

    @RequestMapping("/consumer/fallback/{id}")
    //@SentinelResource(value = "fallback")//没有配置
    //@SentinelResource(value = "fallback", fallback = "handlerFallback") //fallback只负责业务异常
    @SentinelResource(value = "fallback",blockHandler = "blockHandler") //blockHandler只负责sentinel控制台配置违规
    //@SentinelResource(value = "fallback",fallback = "handlerFallback",blockHandler = "blockHandler", //两个都存在的时候,才是双剑合璧,直接封神
            //exceptionsToIgnore = {IllegalArgumentException.class})  //这样表示这个异常handlerFallback方法不管,任由它自生自灭
    public CommonResult<Payment> fallback(@PathVariable Long id)
    {
        CommonResult<Payment> result = restTemplate.getForObject(SERVICE_URL + "/paymentSQL/"+id, CommonResult.class,id);

        if (id == 4) {
            throw new IllegalArgumentException ("IllegalArgumentException,非法参数异常....");
        }else if (result.getData() == null) {
            throw new NullPointerException ("NullPointerException,该ID没有对应记录,空指针异常");
        }

        return result;
    }

    //本例是fallback
    public CommonResult handlerFallback(@PathVariable  Long id,Throwable e) {
        Payment payment = new Payment(id,"null");
        return new CommonResult<>(444,"fallback处理java异常---->,exception-->  "+e.getMessage(),payment);
    }

    //本例是blockHandler
    public CommonResult blockHandler(@PathVariable  Long id,BlockException b) {
        Payment payment = new Payment(id,"null");
        return new CommonResult<>(445,"blockHandler负责sentinel控制台配置违规: blockException--> "+b.getMessage(),payment);
    }


    //==================OpenFeign
    @Resource
    private PaymentService paymentService;

    @GetMapping(value = "/consumer/paymentSQL/{id}")
    public CommonResult<Payment> paymentSQL(@PathVariable("id") Long id) {
        //System.out.println("----->"+paymentService.getClass());

        return paymentService.paymentSQL(id);
    }


}
